Trying to get into D&D and rolled 1 for initiative.

Just finished Stranger things and a few friends of mine and myself are trying to get into D&D. I'm hearing conflicting things saying I need the monster manual, player's handbook, and the dungeon master guide and that I don't need any of it. I'm also told I need to play 3rd edition because 5th edition is "annoying" compared to 3rd. I was also told 4th edition is easier for people who haven't played before. I was given a basic understanding of it all and to be honest I feel overwhelmed with what to pick so it is best for everyone just starting out.
Any input from you guys would be appreciated!
TL:DR Guy tries to start playing D&D and feels overwhelmed.